Martin Aspeli wrote:
Dieter Maurer wrote:
Martin Aspeli wrote at 2007-1-7 23:40 +0000:
...
Why not do it a more Zope3 ish way:
class ICMFTool(Interface):
"""Marker for any CMF tool"""
and then in the subclass of the local component registry:
local_utility = ....
if ICMFTool.providedBy(local_utility):
local_utility = local_utility.__of__(context)
or so.
No need to invent a new marker interface for this.
Objects ready to participate in context wrapping indicate this
by the "__of__" method...
No, no need, but I'd argue good reasons.
- It's an explicit declaration of support
- It's a lot less magic
- It's prettier than getattr/hasattr
- If something else has an __of__() for whatever reason, we don't catch
it by accident.
- It may not be desirable to wrap everything that *could* be wrapped.
Actually, I agree with Dieter here. If something has an __of__(), just
wrap it. You can't possibly do anything wrong, actually, as it already
happens and it provides the best backward compatibility with what we
have right now.
Once we support __parent__ pointers, we can phase out the wrapping. We
can do that by making less and less objects have those __of__() methods
for example.
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